Service manual

Safety Symbol Definitions

Symbol Description Symbol Description

Direct current

Terminal for Line conductor on permanently

installed equipment

Alternating current

Caution, risk of electric shock

Both direct and alternating current

Caution, hot surface

Three-phase alternating current

Caution (refer to accompanying documents)

Earth (ground) terminal

In position of a bi-stable push control

Protective earth (ground) terminal

(Intended for connection to external

protective conductor.)

Out position of a bi-stable push control

Frame or chassis terminal

On (supply)

Terminal for Neutral conductor on

permanently installed equipment

Off (supply)

Terminal is at earth potential

(Used for measurement and control

circuits designed to be operated with

one terminal at earth potential.)

Standby (supply)

Units with this symbol are not completely

disconnected from ac mains when this switch is

off. To completely disconnect the unit from ac

mains, either disconnect the power cord or have

a qualified electrician install an external switch.

Printing History

The edition and current revision of this manual are indicated below. Reprints of this manual containing minor corrections

and updates may have the same printing date. Revised editions are identified by a new printing date. A revised edition

incorporates all new or corrected material since the previous printing date. Changes to the manual occurring between

revisions are covered by change sheets shipped with the manual. Note that not all changes made to the power supply affect

the content of the manual. Refer to Appendix A for a history of manual updates.

Edition 1 April 1994

Edition 2 September, 2000

Updated March, 2002

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Inc. The information contained in this document is subject to change without notice.